Počet záznamů: 1
Nickel and palladium complexes with fluorinated alkyl substituted alpha-diimine ligands for living/controlled olefin polymerization
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SYSNO ASEP 0489953 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Nickel and palladium complexes with fluorinated alkyl substituted alpha-diimine ligands for living/controlled olefin polymerization Tvůrce(i) Mundil, R. (CZ)
Sokolohorskyj, A. (CZ)
Hošek, J. (CZ)
Cvačka, Josef (UOCHB-X) RID, ORCID
Císařová, I. (CZ)
Kvíčala, J. (CZ)
Merna, J. (CZ)Zdroj.dok. Polymer Chemistry . - : Royal Society of Chemistry - ISSN 1759-9954
Roč. 9, č. 10 (2018), s. 1234-1248Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova ethylene polymerization ; living polymerization ; catalytic behavior Vědní obor RIV CD - Makromolekulární chemie Obor OECD Polymer science Institucionální podpora UOCHB-X - RVO:61388963 UT WOS 000428791700010 EID SCOPUS 85043343975 DOI 10.1039/c8py00201k Anotace A series of six nickel and two palladium novel complexes bearing alpha-diimine ligands with fluorinated alkyl substituents in para-aryl positions was prepared. Two nickel complexes were structurally characterized by X-ray diffraction. Upon activation by methylaluminoxane or borate, the complexes were tested in ethene, propene, and hex-1-ene polymerization using toluene and chlorobenzene. Propene and hex-1-ene polymerization initiated by nickel complexes and ethene polymerization initiated by palladium complexes showed living/controlled character and yielded high molar mass polyolefins with narrow molar mass dispersity (D < 1.2). The effect of fluoroalkyl substituents on catalyst activity, thermal stability and chain-walking is only minor. The branching density of polyolefins can be regulated more efficiently by the variation of ortho-aryl and backbone substituents of alpha-diimine ligands. The topology of polyethylenes prepared by palladium complexes at low ethene pressure is dendritic as shown by Mark-Houwink plots and g' values obtained from SEC with viscometric detection. The solubility of most of the complexes in fluorinated solvents is limited with the exception of palladium methyl chloride derivatives which suggest the promising method for further design of catalysts suitable for interphase polymerization. Pracoviště Ústav organické chemie a biochemie Kontakt asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Jana Procházková, Tel.: 220 183 418 Rok sběru 2019
Počet záznamů: 1